Improvement in oscillating valves



UNITED 1if TATES PATENT Finca.

IMPROVEMENT IN OSCILLATING VALVES.

Specification forming part of Letters Patent No. 45,2225., dated November 29,1864.

To all whom it may concern Be it known that I, Rev. J. W. GARHART, of Cohoes, in the county of Albany and State of New York, have invented a new and Improved Oscillating Valve; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a transverse vertical section of my valve, showing its position in relation to the ports. Fig. 2 is a longitudinal section ot the same. Fig. 3 is a detached perspective view of the plug. Fig. 4 represents a transverse vertical section of the valve, showing the cut-ott'. Figs. 5, 6, and 7 are diagrams illustrating the various lpositions of the valve.

Similar letters of reference indicate correspending parts. y

This invention consists in the use of a plug or valve with one circular and one semicircular end, the two ends being connected by a liat abutment in such a manner that when the plug is iitted into a corresponding socket its circular end closes the rocket all round 5 but its semicircular end closes the socket only half-way, giving access to the steam to that compartment ot the socket below the abutment, and by imparting to this plug an oscillating motion the steam can be changed, throwing the ports alternately in communication with the steam pipe and with the exhaust-pipe.

A represents a plu g made of metal or any other suitable material. Une end, a, ot' this plug is circular, and its other end, b, is semicircula-r, as clearly shown in Fig. 3, and the two ends are connected by a tlat abutment, c. This plug is titted in a suitable socket, B, as clearly shown in Fig. 2, so that the end a tits the socket all round, and the abutment c divides the same in two compartments d c, one ot' which is closed by the semicircular end b, whereas the other is open and iree to receive steam. The socket B communicates by channels f j" with the steam-ports of a cylinder, and a channel, g, leads from the same to the exhaust-pipe, as shown in Fig. 1, and steam is admitted to it through the pipe, h Fig. 2. Then the valve is in its central position, it closes the ports f ff, (see Fig. 1,) and the steam entering through the pipe It is confined to the compartment e; but if the valve is brought in the position shown in red outlines in Fig. 1 the compartment e communicates with the steam-channel f', and the channel f is brought in communication with the exhaustpipe. The steam-cylinder takes steam at the port j, and it exhausts through the port j. By reversingv the valve the steam is changed, and if a regular oscillating motion is imparted to the valve the regular action of the steamengine is produced.

This valve is very easily tted. Itis made in the exact form of the plug of an ordinary faucet with such parts removed as shown. It is perfectly balanced, so that it works equally Well under pressure as it does in the open atmosphere. 1t can easily be kept tight, and it can be applied to steam-engines of any desired description.

A represents the form of the valve when a cut-ott' is desired. At the point of cut-ott' the valve stands as represented in Fig. et, closing the port j", but leaving the steam free to exhaust through the port f. When the piston reaches the end of the stroke, another movev mentot' the valve is made, bringing it in the position represented by the red outline, when the change is made, and the steam is admitted to the portf and exhausts through the port j I claim as new and desire to secure by liettcrs lPatent-4 A valve with a circular end, a, semicircular end b, and abutment c, of such form as to et'- fect a cut-ott', and fitted into a socket, B, to operate substantially as and for the purpose herein shown and described.

J. V. CARHART.

Witnesses A.. M. HARMON, S. R. ANDRES. 

